https://www.target.com/p/franklin-sports-40mm-table-tennis-balls-12ct/-/A-52846381?ref=tgt_adv_XS000000&AFID=google_pla_df&fndsrc=tgtao&CPNG=PLA_Sports+Shopping_Brand&adgroup=SC_Sports&LID=700000001170770pgs&network=g&device=c&location=9030970&ds_rl=1246978&ds_rl=1246978&ds_rl=1246978&gclid=EAIaIQobChMIjYDJ0pGN5QIVhBx9Ch3I_g0pEAQYASABEgK6V_D_BwE&gclsrc=aw.dsIt was within the past year or so. I don't remember exactly when or what brand. I threw away the cardboard box they were in long ago. I think the packaging was dark blue.
Or buy a quart of nitrocellulose lacquer already prepared for $19.